Winding-indicator for clocks.



W. J. A. MIELKE. WINDING INDICATOR FOR CLOCKS.

APPLICATION FILED MAR. 29, 1909.

Patented June 29, 1909.

Witnuoaa Cir WILLIAM J. A.

' JINDEN Mll lLlil l, O1 GRAFTON, WISCONSIN.

Application filed Iaiarch 29, 15109.

States, residing at lton, in the county of Ozaukee and State of il'dSCODSill, have invented certain r w and l useful Improvements in p inding-lni caters for Cloc rs of which the fOllO\\'1ll 1s a specification, reference being had to the accom- 3 p anying drawings.

This invention relates to improvements in 3 clocks and more particularly to attachments therefor for indicating in spring clocks, when the clock has run down or requires rewinding. The ObJG-C't of the iivention is to provide a simple and practical mechanism of this char acter which may be easily applied to the clock works and which will indicate the nu inber of days since the last winding of the main spring and the number of days that the clock will continue to run before its spring needs rewinding.

lily-tj :1 l TI:- i rl t nl n i 1 1 r a'i' il 1 n it aooi c and nor oopcis ii... in. the invention consists in the novel feat of construction and the combination 211M l scribed and claimed, and illustrated in "he accompanying drawing, in which Figure 1 is a front view of a clock having the invention applied thereto, a portion of the dial being broken away, and Fig. 2 is a perspective view of the parts of the invention removed from the clock.

In the drawings 1 denotes the body or frame of a clock of any ordinary or preferred construction, 2 denotes the dial, 8 its hands mounted upon concentric shafts a, and 5 denotes its main spring carried by the usual supporting frame 6 within the casing 1.

in practice of the invention 1 provide in 3 which is preierthe dial 2 an arc-shape slot 7 ably concentric with the and rearwardly extending lever 14 fulcruined intermediate its ends between angular brackets 15 secured to a plate or bar 16 arranged upon the lower portion of the frame 16.

Specification of Letters shafts 1 and in which operates an indication finger or Patent. Patented June 29, 1909.

Serial 110. 486,543.

It will be understood that the plate or bar 16 may be a part of the frame 6 or that it may be formed separate and secured thereto by suitable fastenings. As illustrated in the drawings, said plate 16 is formed separate from the frame 6 and one of its ends projects I to one side of the frame and has one end of the main spring 5 secured to it. I have found that by securing the outer end of the spring at a greater distance from the vertical center i of the clock, the spring will uncoil more regularly and only in. the one direction, thereby l increasing the degree of movement of the lever 14.

l The inner end of the lever 1.4 has an angui lar portion 17 adapted to bear against the l main spring 5 so that said lever and consequently the bell crank 9 and pointing finger will be actuated by said spring as it uncoils or expands. A leaf spring 18 has one of its ends fixed, as shown 19, to the bar or plate and its other or free end is seated in a notch 20 formed in the upper edge of the front end of the lever 14 whereby the end 17 l of said lever is held at all times in contact with. the main spring.

It will be inulerstocd. that the gi'aduations 11 are numbered to correspond to the number of days which the clock will run on one winding of its main spring, and that the parts of the invention are so proportioned that as the spring unwinds the finger or i pointer 10 will indicate the number of days i which the clock has run since its last winding and also the number of days it will continue to run before it must be rewound.

Hav' ig thus described my invention, What is claimed is:

1. 'lhe combination with. a clock having a spring and a dial formed with an arc-shaped slot, and graduation marks along said slot, of a bell crank arranged in rear of the dial and havin one arm offset to project through and i move in said arc-shaped slot in the dial to i provide a pointer which co-acts with said graduations, arockingleverfulcrumed interl mediate its ends and having one end bearing against said spring, spring for actuating said lever in one direction. and a link connecting said lever and the other arm of the bell crank.

2. The combination with a clock having a spring, hour and minute hand shafts, a dial formed with an arc-shaped slot concentric l with said shafts, graduation marks arranged along said slot and a supporting frame, of a its projection in contact with the clock bell crank mounted on said shafts in rear of spring and a link connecting the last menthe dial and having one arm offset to project tioned end of said lever with the other arm through and swing in the arc-shaped slot in of the bell crank.

5 the dial and to provide a pointer to co-act In testimony whereof I hereunto affiX my 15 with said graduation marks, a lever fulsignature in the presence of two Witnesses. cruined intermediate its ends on said frame WILLIAM J. A. MIELKE. and having a projection at its inner end to Witnesses: engage the clock spring, a leaf spring bearing WM. F. MINTZLAFF,

10 upon the other arm of the lever to maintain I ROBT. P. ZAUN. 

